# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/timer/riscv,timer.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: RISC-V timer
maintainers:
- Anup Patel <anup@brainfault.org>
description: |+
RISC-V platforms always have a RISC-V timer device for the supervisor-mode
based on the time CSR defined by the RISC-V privileged specification. The
timer interrupts of this device are configured using the RISC-V SBI Time
extension or the RISC-V Sstc extension.
The clock frequency of RISC-V timer device is specified via the
"timebase-frequency" DT property of "/cpus" DT node which is described
in Documentation/devicetree/bindings/riscv/cpus.yaml
properties:
compatible:
enum:
- riscv,timer
interrupts-extended:
minItems: 1
maxItems: 4096 # Should be enough?
riscv,timer-cannot-wake-cpu:
type: boolean
description:
If present, the timer interrupt cannot wake up the CPU from one or
more suspend/idle states.
additionalProperties: false
required:
- compatible
- interrupts-extended
examples:
- |
timer {
compatible = "riscv,timer";
interrupts-extended = <&cpu1intc 5>,
<&cpu2intc 5>,
<&cpu3intc 5>,
<&cpu4intc 5>;
};
...
